Rates of women who are opting for preventive mastectomies, such as Angeline Jolie, have increased by an estimated 50 percent in recent years, experts say. But many doctors are puzzled because the operation doesn't carry a 100 percent guarantee, it's major surgery -- and women have other options, from a once-a-day pill to careful monitoring.

Kendra and Maliyah Herrin, who were born fused at the mid-torso, had been in critical condition since their separation in a 26-hour surgery that ended Aug. 8 at Primary Children’s Medical Center. They were removed from ventilators Saturday.